SystemD script example for unoconv on CentOS/RedHat 7.x

If you installed LibreOffice 5.2 packages that are not part of the CentOS/RedHat distribution,
You better add the Environment="UNO_PATH=/opt/libreoffice5.2/program" to the file (as seen in the example below) as unoconv might need the python libraries that came with the LibreOffice 5.2 packages.
Otherwise, discard the 'Environment' line from the file.

Also, if you installed 'unoconv' from sources (like in the example below), make sure you use the proper path (i.e "/usr/local/bin/unoconv").